Catsyn offer gram to tons of 4',5'-Bis(4-carboxyphenyl)-3',6'-dimethyl-[1,1':2',1''-terphenyl]-4,4''-dicarboxylic acid | CAS 2161327-52-0, its formula is C36H26O8, molecular weight is 586.59g/mol and the purity is usually NLT 98%.